Furnace wall



I. HARTER FURNACE WALL March 7, 1933.

Original Filed July 3, 1928 FIG-.2;

FI GD FIGQl Patented Mar. 7, 1933 UNITED STATES PATENT O C ISAAC HARTER, OF NEW YORK, N. Y., A SSIGNOR T0 FULLER LEHIGH COMPANY, OF FULLERTON, PENNSYLVANIA, A CORPORATION OF DELAWARE FURNACE WALL Application filed July 3, 1928, Serial No. 290,117. Renewed September 8, 1982.

This invention relates to a furnace wall that is provided with wall coolin tubes and has bars upon the tubes upon whlchash and slag may collect to form a layer. The invention will be understood from the descri tion in connection with the accompanying rawing in which Fig. 1 is a side view of the wall partly broken away from the inside of the culation system of a steam boiler that is heated by the furnace.

Bars 2 which may be'made of metal extend across the spaces between the tubes, these bars preferably being approximately as long as the distance between the .tube centers. Each bar may be made of a flat piece of metal with the ends twisted or turned as indicated at 3 so as to lie in planes at right angles to the main body portion of the bars, so that the portion of the bar between tubes presents its narrow edge towardsthe inside of the furnace. The bars are installed one above the other with the flat end portions having large areas lying a ainst the sides of the tubes opposite the inside of the furnace and these bars t ld t th b t h d may be SP0 we ed 0 e tu es or at ac e extending lnto the spaces between sald tubes thereto in any other convenient manner. By

the above arrangement,a good heat exchange relation is obviously provided between the tubes and the bars.

A layer of insulating material 4 is applied on the outside of the tubes and is kept in place by means of the bars, and a casingfi of metal is placed along the outer surfaces of the layer of insulating material 4.

The horizontal or main body portions of the bars extend short distances into the spaces between the tubes and are spaced apart, thus providing ledges or supports upon which ash and slag from the fuel may collect and form a layer. These ledges, to-

.center lines of said bars bein the slag or other residue from the burning fuel in the furnace may deposit. The insulating material forms the back or bottom of each recess, as will be evident.

While I have shown the invention as embodied in a specific-form, it is to be understood that various changes in details may be made without departing from the scope of the invention, and I therefore do not intend to limit myself except by the appended claims. V

I claim:

1. In a furnace wall, a row of vertically d sposedwater tubes spaced apart, and metal bars of substantially uniform width and thickness from one end to the other exposed to the radiant heat of the furnace and extending from one tube to another having substantially horizontal portions extending toward the inside of the furnace approximately in the plane of the row of tubes.

.2. In a furnace wall, a row of water tubes spaced apart and exposed to radiant heat of the furnace, and metal bars consisting of flat metal with twisted ends to contact with said tubes extending from one tube to another the located outside of the center line of saidtu es.

3. In a furnace wall, a row of vertically disposed water tubes spaced apart, and a series of flat metal bars havin in contact with said tubes and their edges and being exposed to the furnace. v 4. In a furnace wall, a row of vertically disposed water tubes spaced apart, and a series of flat metal bars-having thesides of their ends in contact with said tubes and the edges of their intermediate portions in planes at an angle to said tubes and being exposed to the furnace.

5. In a furnace wall, a row of vertically disposed water tubes spaced apart, and metal bars extending from one tube to another hav ing substantially horizontal portions extending toward the inside of the furnace and being exposed to the furnace, said bars contheir sides tacting only with the sides of said tubes opposite the inside of said furnace.

6. In a furnace wall, a row of vertically disposed water tubes spaced apart, and metal bars extending from one tube to another having substantially horizontal portions extendin toward the inside of the furnace and being exposed to the furnace, said bars havin flat portions contacting only with the si es of said tubes opposite the inside of the furnace.

7. In a furnace wall, a row of vertically disposed water tubes spaced apart, and metal bars consisting of flat metal with twisted ends extending from one tube to another, the twisted ends of said bars having their broader sides contacting with said tubes and their intermediate portions exposed to the furnace.

8. In a furnace wall, a row of vertically ,disposed water tubes spaced apart, and metal bars consisting of flat metal withtwisted ends extending from one tube to another, said bars being substantially as long as the distance be tween tube centers and having the broad sides of their twisted ends contactingwith said tubes and their intermediate portions exposed tothe furnace.

9. In a furnace wall, a row of vertically disposed tubes, and metal bars extending tubes having vertically disposed portions lying against said.tubes and horizontally disposed portions extending into the spaces between said tubes and exposed to the furnace, said vertically disposed portions and said horizontally disposed portions being of substantially the same width.

10. In a furnace wall, a row of vertically disposed water tubes spaced apart, and metal .bars spaced apart along the tubes and consist-' ing of flat metal with twisted ends the twisted ends of said bars having the1r broader sides contacting withsaid tubes and said bars having portions substantially bridging the spaces between adjacent tubes .and connected to said ends and having their edges exposed to the furnace between said tubes, and means securing said ends to the tubes.

11. A furnace wall comprising a row of spaced substantially parallel verticall extending tubes, spaced along said tubes and having flat portions extending outwardly from said tubes into the spaces therebetween and presenting their narrow edges towards the inside of the furnace, said flat portions substantially bridging the spaces between adjacent tubes,

7 means securing said members to said tubes with large areas thereon contacting with sole-v ly the outer sides of said tubes and in good heat exchange relation thereto, and means adjacent said outer sides of the tubes and the outer edges of said flat portions of the members closing the spaces between the tubes and forming with the tubes and flat portions metallic members 0 osely narrow edges towards the inside of the furnace, said flat portions substantially bridging the spaces between adjacent tubes, said members being welded to said tubes with large areas thereon contacting with solely the outer sides of said tubes and in good heat exchange relation thereto, and means adjacent said outer sides of the tubes and the outer edges of said flat portions of the members closing the spaces between the tubes and forming with the tubes and flat portions of the members a plurality of recesses in which residue from fuel burning in the furnace may deposit.

ISAAC HARTER. 

